package br.unipar.blog.web.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import br.unipar.blog.persistence.entity.Usuario;
import br.unipar.blog.web.controller.usuario.LoginController;

public class SessionFilter implements Filter {

    @Override
    public void init(FilterConfig fc) throws ServletException {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {

        HttpServletRequest req = (HttpServletRequest) request;
        HttpServletResponse resp = (HttpServletResponse) response;

        Usuario usuarioSession = (Usuario) req.getSession().getAttribute(
                LoginController.USUARIO_SESSION);

        if (usuarioSession != null) {
            chain.doFilter(request, response);
            return;
        }

        req.getRequestDispatcher("/").forward(request, response);

    }

    @Override
    public void destroy() {
    }
}
